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/*Copyright (c) 2011, Florent DEVILLE.                                      */
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#pragma once

#include "RTVector3f.h"
using RT::RTVector3f;

#include "GRTMaterial.h"

class Vertex
{
public:  
	float X;   
	float Y;
	float Z;
	       
	double U;   
	double V;
};

class GLUquadric;

/*Singleton used to draw primitive in the viewports*/
class GRTGLVisu
{
private:
	//singleton variable
	static GRTGLVisu* _instance;

	//sphere variable
	GLUquadric* _sphereQuadric;

	//disc variable
	GLUquadric* _discQuadric;

private:
	//constructor
	GRTGLVisu();

	//destructor
	~GRTGLVisu();

public:
	//return the singleton instance
	static GRTGLVisu& getInstance();

	//delete the singleton
	void close();

	//add a point light to the scene
	void addGRTPointLight(unsigned int lightID, const RTVector3f& position, const RTVector3f& attenuation, GRTMaterial& m);

	//add a directional light to the scene
	void addGRTDirectionalLight(unsigned int lightID, const RTVector3f& direction, GRTMaterial& m);

	//add a spot light to the scene
	void addGRTSpotLight(unsigned int lightID, const RTVector3f& position, const RTVector3f& direction, 
		const RTVector3f& attenuation, float cutOff, float exponent, GRTMaterial& m);

	//add the global ambient light
	void addGlobalAmbientLight(float* light);

	//draw a box with the specific size
	void drawBox(float width, float height, float depth);

	//draw a sphere
	void drawSphere(float radius);

	//draw a cylinder
	void drawCylinder(float radius, float height);

	//draw a cone
	void drawCone(float radius, float height);

	//draw a torus
	void drawTorus(float smallRadius, float bigRadius);

	//draw a triangle calculating it's normal
	void drawTriangle(const RTVector3f& v1, const RTVector3f& v2, const RTVector3f& v3);

	//draw a triangle
	void drawTriangle(const RTVector3f& v1, const RTVector3f& v2, const RTVector3f& v3, const RTVector3f& n);

	//draw the translation mark
	void drawTranslationMark(const RTVector3f& hoovered);

	//draw the rotation mark
	void drawRotationMark(const RTVector3f& hoovered, float radius, const RTVector3f& rotation);

	//draw the scale mark
	void drawScaleMark(const RTVector3f& hoovered);

	//draw a simple rotation mark
	void drawSimpleRotationMark(bool hoover, float radius);

	//draw the box which surround the selected object
	void drawSelectionBox(float width, float height, float depth);

	//draw the representation of a directionnal light
	void drawDirectionnalLight(const RTVector3f& direction);

	//draw the representation of a point light
	void drawGRTPointLight()const;

	//draw the representation of a spot light
	void drawGRTSpotLight()const;

	//draw the grid
	void drawGrid(const RTVector3f& eye)const;

	//disable all the opengl source lights
	void disableUnusedLights(int nbUsed)const;

	//draw the representation of the camera
	void drawCamera()const;

private:
	//create the vertex buffer for the sphere
	void createSphere();

};

//call the singleton
#define VISU GRTGLVisu::getInstance()